What is growing on my clam

[bjledbetter]

Is this a new clam growing on my old one or what is this? Its been there for a while but I just noticed today that it is opening and closing.

 

[kchristensen8064]

Are you able to get pictures from different angles?

 

[ritter6788]

Looks like a little filter feeder clam. They come on live rock often. There are really small ones and some bigger ones are called Turkey Wings.

 

[skinz78]

Agreed.

 

[bjledbetter]

That's about the best pics I can get. It was on the clam when I got him about two years ago as a little spot and has kept growing. It. Don't seam to be bothering the other big clam so I'm just gonna leave it alone